Veeco Dimension 3100, Руководство пользователя

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Force Imaging
Force Plots–An Analogy
Rev. D Dimension 3100 Manual 205
Figure 13.1a Comparative Index of Pulling Forces
The pulling force is measured at 1 cm height intervals while the scale and magnet lower and lift in a
controlled cycle.
Figure 13.1b depicts a plot of this experiment using two magnets. The plot depicts
each magnet’s attraction as it approaches the plate, and its tenacity when pulled off the plate.
Assuming both magnets are the same size, this reveals information about each magnet’s power.
First, magnet #1 is weaker, attaching to the steel plate with 7N of pulling force at 6cm, and magnet
#2 is stronger, attaching at 7cm with 10N.
Figure 13.1b Pulling Forces Graph
1. For the sake of simplicity, forces are represented here using a common scale in kilogram units; however, force is properly
measured in Newtons (1 kg = 9.8 N).
H = 11 cm
F = 0 kg
H = 10 cm
F =.08 kg
H = 9 cm
F =.12 kg
H = 8 cm
F =.30 kg
H = 7 cm
F = 1.0 kg
Steel plate
(0 N)
(0.8 N)
(1.2 N)
(2.9 N)
(9.8 N)
2
3
4
5
6
7
8
9
10
11
H
Height above steel plate (cm)
0
-10
10
Magnet #1
Magnet #2
+1
0
-1
-5
N
kg
2 3 4 5 6 7 8 9 10 11